The TSDC (Thermally Stimulated Depolarization Currents) testing system is a high-precision testing instrument used to study changes in the polarization state of dielectric materials under thermal stimulation. Its fundamental principle is based on the short-circuit current (i.e., depolarization current) generated when the material establishes or removes its polarization state during the heating process. By recording the relationship between the current and temperature, a TSDC spectrum is plotted, thereby revealing the micro-electrical characteristics of the material.

Polarization Equipment:GoGo Instruments Probe Heating/Cooling Stage (EMini-200)

Temperature Control Range:RT~200°C

Heating Rate:0.1~50°C/min

Temperature Stability:±0.1°C

Withstand Voltage:10kV

Testing Equipment:

GoGo Instruments Thermally Stimulated Current Testing System（TSDC-ECH600）

Temperature Control Range:-190°C~600°C

Heating/Cooling Rate:0.1~30°C/min

Temperature Stability:±0.1°C

Leakage Current:≤10pA/s 30fA (optional)

GB/T 3389-2008 Test methods for the properties of piezoelectric ceramic materials - Measurement of performance parameters;

Polarization Stage: Clamp the sample between two electrodes, heat it to a specific temperature in an oil bath to activate charge carriers, and apply a DC polarization voltage to fully polarize the sample.

Freezing Stage: Rapidly cool down to a low temperature to "freeze" the polarization state.

Depolarization Stage: Heat up at a constant rate while measuring the depolarization current short-circuited through a galvanometer, obtaining the TSDC spectrum.

Using a PZT ceramic capacitor disc as an example, perform a Thermally Stimulated Depolarization Current test.

1.Electrometer used: Tonghui TH2690.

2.Measure the sample thickness, place the sample into the probe heating/cooling stage for polarization.

3.Place the sample into the probe heating/cooling stage, use the probes to form a circuit between the sample and the electrometer.

4.Set up the test program segments and collect the current.

5.Test Results: